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D 11. Oil contains energy 42 kJ/ g, lead-batteries contain energy 0.125 kJ/g, so how many...
Chemistry 11 Learning Check How much energy (in kJ), is released when 1.80 g of steam at 120°C is cooled to liquid water at 50°C. AHvan = 40.67 kJ/mol Cp = 33.6 J/Kmol steam CP = 75.3 J/K mol p water = 18.0 g/mol H2O 38 Chemistry Phase Changes/Enthalpy & Entropy
Lead batteries are widely used in vehicles, energy storage for solar systems, wind power, telecommunications, and data centers. Approximately 80% of lead produced worldwide goes into batteries. Lead is a highly toxic metal, and lead in this case relates to exporting used batteries to Mexico. Elevated levels of lead in the human body have been associated with damage to many organs and body tissues, including the heart, bones, intestines, kidneys, and reproductive and nervous systems. High lead exposure in young...
A system contains 112 g of nitrogen gas. How many moles does it contain? mol
water has a specific heat of 4.184J/g degree C. How many kJ of energy are required to raise the temperature of0. 453kg of water from 21.0 degree C to 37.0 degree C?
c. 6.0 × 10-10 d. 4.4 x 1014 ·5 × 10-11 42 8. How many grams of Mn(OH)s will dissolve in 1350 ml. of water at 25° K-1.0x 1036 4.6 × 10-8 g 6.3 x 10 g c. 5.9x 1010 g d. 1.4 x 107g e. 9.3 x 107g - 10 D15-10
11,12,13,14,15-- with clear explanatioms please. thanks so
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11. How many atoms of hydrogen are in 1.00'mole of water? 6.02 x 10 b. 1.20 x 10 c. 1.81 x 10 d. 2.41 x 10 e. 3.01 x 10 a. 12. Determine the number of sulfur atoms in 27.1 g of molecular sulfur (S.). a. 0.845 b. 5.27 x 10 c. 5.09 x 10 d. 2.07 x 10 e. 0.106 13. What is the mass of 2.2 x 10 CO, molecules?...
Homework #7A Name: Due date: 3-16-20 1. How many moles of water, H20, contain 9.03 * 10molecules of water? 2. How many molecules are present in 4.9 moles of L,CO3. 3. How many moles of oxygen are present in 4.9 moles of L.COM 4. How many Li atoms are in 4.5 moles of Li? 5. Calculate the mass, in grams, for 3.75 10 molecules of C2Hs. 6. Calculate the mass, in grams, for 3.5 moles of CHO. 7. Calculate the...
7. How many calories are required to increase the temperature of 13 g of alcohol from 11 °C to 23 specific heat of alcohol is 0.59 cal/g °C. A. 83 cal B. 0.54 cal C. 92 cal D. 170 cal E. 0.63 cal 9. A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbohydrate, and 28 g of protein How many kcal of energy does the cheeseburger contain? (The caloric values are: 4 kcal/g...
When 1436 J of heat energy is added to 41.2 g of hexane, CH,,, the temperature increases by 15.4 °C. Calculate the molar heat capacity of CH. Cp = 1/(mol·°C) Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 7.10 MJ of energy in the form of heat if the temperature of the sodium is not to increase by more than 10.0 "C? Use Cp = 30.8 J/(K.mol) for...
25) Objects can possess energy as (a) endothermic energy (b) potential energy (c) kinetic energy A) a only B) b only C) c only D) bandc E) a and 33) The value of AH' for the reaction below is - 790 kl. The enthalpy change accompanying the reaction of 0.95 g of Sis_ k 33) 25 (s) + 302 (9) -2503 (9) A) 12 B) 23 C) -23 D) - 790 E) -12 34) The value of AH' for the...